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Home >> Infiniti >> 2013 >> EX37 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0152 >> DTC U1003: Can Comm Circuit >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE: If DTC U1003 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to "DTC LOGIC ".
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U1003 Lost communication with VVEL control module CAN communication signal other than OBD (emission related diagnosis) is not received between VVEL control module and ECM for 2 seconds or more.
  • Harness or connectors (VVEL CAN communication line is open or shorted)
  • ECM
  • VVEL control module